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NEET AIPMT SOLVED PAPER 2000

  • question_answer
                    In the following reaction, how is the rate of appearance of the underlined product related to the rate of disappearance of the underlined reactant?                                                                                                         \[BrO_{3}^{-}(aq)+\underline{5B{{r}^{-}}(aq)}+6{{H}^{+}}(aq)\xrightarrow{{}}\underline{3B{{r}_{2}}(l)}+3{{H}_{2}}O(l)\]

    A)                 \[\frac{d[B{{r}_{2}}]}{dt}=-\frac{5}{3}\frac{d[B{{r}^{-}}]}{dt}\]                   

    B)                 \[\frac{d[B{{r}_{2}}]}{dt}=-\frac{d[B{{r}^{-}}]}{dt}\]

    C)                 \[\frac{d[B{{r}_{2}}]}{dt}=\frac{3}{5}\frac{d[B{{r}^{-}}]}{dt}\]     

    D)                 \[\frac{d[B{{r}_{2}}]}{dt}=-\frac{3}{5}\frac{d[B{{r}^{-}}]}{dt}\]

    Correct Answer: D

    Solution :

                    \[-\frac{1}{5}\frac{d\,[B{{r}^{-}}]}{dt}=+\frac{1}{3}\frac{d\,[B{{r}_{2}}]}{dt}\]                 \[or\frac{d\,[B{{r}_{2}}]}{dt}=-\frac{3}{5}\frac{d\,[B{{r}^{-}}]}{dt}\]


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